Vacum Leak Causing Backfiring C280
 

I found a vacum leak in my car... it is coming from the grey wire which is on the top leftmost... it is sucking air and i also hear the other end of the leak coming from in between the two rear tires some where... what could this be? my car has a rough idle, lose of power, and backfiring... can i fix this myself? could it be a O2 sensor?

here is the pic, ignore the red circle its the grey wire to the right of it


https://webspace.utexas.edu/babtahi/pics/dsc00536.jpg

i really need help on this one, i have no money to throw parts on the problem

Make and model would be pertinent in knowing what to diagnose with your vehicle. ;)

The hissing in the rear is the sound of your fuel pump(s). This is normal. When they go bad, they start buzzing.

it is a 1996 C280... i think it has to do with the air coming from that grey vacum tube.


if it is my MAS i am going to be mad b/c it was changed less than 6 months ago... my father has a 96 E320, is the MAS on this car the same as mine, b/c then i could swap and see if there is a difference.